141-52-6Relevant articles and documents
Enhanced vapor-phase processing in fluorinated Fe4 single-molecule magnets
Rigamonti, Luca,Piccioli, Marco,Malavolti, Luigi,Poggini, Lorenzo,Mannini, Matteo,Totti, Federico,Cortigiani, Brunetto,Magnani, Agnese,Sessoli, Roberta,Cornia, Andrea
, p. 5897 - 5905 (2013)
A new tetrairon(III) single-molecule magnet with enhanced volatility and processability was obtained by partial fluorination of the ancillary β-diketonato ligands. Fluorinated proligand Hpta = pivaloyltrifluoroacetone was used to assemble the bis(alkoxido
A contamination-insensitive probe for imaging specific biomolecules by secondary ion mass spectrometry
Kabatas, Selda,Vreja, Ingrid C.,Saka, Sinem K.,H?schen, Carmen,Kr?hnert, Katharina,Opazo, Felipe,Rizzoli, Silvio O.,Diederichsen, Ulf
, p. 13221 - 13224 (2015)
Imaging techniques should differentiate between specific signals, from the biomolecules of interest, and non-specific signals, from the background. We present a probe containing 15N and 14N isotopes in approximately equal proportion, for secondary ion mass spectrometry imaging. This probe designed for a precise biomolecule analysis is insensitive to background signals.
Scavenging Reaction of Solvated Electron Produced by UV Laser from Iodide Anion in Liquid Beam
Matsumura, Hisashi,Mafune, Fumitaka,Kondow, Tamotsu
, p. 5861 - 5864 (1995)
A sodium iodide (NaI) solution in ethanol was introduced into vacuum as a continuous liquid flow (liquid beam) and irradiated with a 220 nm UV laser.Cluster cations containing ethoxide such as Na+(NaOEt), Na+(NaI)n(NaOEt) (n = 1-4), and Na+(NaI)n(NaOEt)2 (n = 1-4) were observed by a time-of-flight (TOF) mass spectrometer.Furthermore, addition of NH4+ or n-BuOH into the NaI ethanol solution resulted in suppressing the intensities of the peaks associated with these cluster ions.It is concluded that the ethoxide is produced by a scavenging reaction of a solvated electron with an ethanol molecule, and the reaction of the ethoxide formation competes with a scavenging reaction by NH4+ or n-BuOH.The rate equations of these competing processes predict the dependence of the ethoxide formation on the concentration of NH4+ or n-BuOH.Similar reaction products were observed from alcohol solutions of several iodides.
Characterization of new Co(II) complexes and photographic monitoring for their toxic impact on breast cancer cells according to simulation study
Shah, Reem,Habeebullah, Turki M.,Saad, Fawaz,Althagafi, Ismail,Al-dawood, Aisha Y.,Al-Solimy, Amerah M.,Al-Ahmed, Zehba A.,Al-Zahrani, Fatimah,Farghaly, Thoraya A.,El-Metwaly, Nashwa
, (2020)
Five new nitrogen-rich ligands (thioanhydrides) were synthesized and fully characterized. Then, their corresponding Co(II) complexes were prepared and also elucidated by analytical and spectral conformational techniques. First of all, the mono-negative tr
Synthesis of new polysubstituted (pyrazoles, pyrimidines and quinolines) five and six-membered heterocycles: Reaction of α,α-dioxoketene dithioacetals with nucleophiles
Ebraheem,Lokanatha Rai,Kudva.n,Bahjat
, p. 3486 - 3492 (2010)
A novel synthesis of polysubstituted pyrazoles 3a-d, pyrimidines 4a-f and quinolines 5a-c via the reaction of α,α-oxoketene dithioacetals 2a-c with hydrazine hydrate, malonohydrazide, urea, thiourea and aniline is reported and the synthetic potential of the method is demonstrated. The structure of the new compounds was established upon their elemental analysis, IR, 1H NMR and 13C NMR.
Synthesis and photophysical properties of europium pentafluorinated β-diketonate complexes
Wan, Yupeng,Lyu, Heng,Du, Hengyi,Wang, Dunjia,Yin, Guodong
, p. 1669 - 1687 (2019)
Two pentafluorinated β-diketone ligands, 4,4,5,5,5-pentafluoro-1-(4-methoxyphenyl)pentane-1,3-dione (PFMP) and 4,4,5,5,5-pentafluoro-1-(4-dimethyl amino-phenyl)pentane-1,3-dione (PFAP), had been employed to synthesize six novel europium (III) complexes wi
Iron(ii) complexes of 2,6-di(1H-pyrazol-3-yl)-pyridine derivatives with hydrogen bonding and sterically bulky substituents
Roberts, Thomas D.,Little, Marc A.,Kershaw Cook, Laurence J.,Halcrow, Malcolm A.
, p. 7577 - 7588 (2014)
Syntheses of 2,6-di(5-aminopyrazol-3-yl)pyridine (L1), 2,6-di(5-tertbutylcarboxamidopyrazol-3-yl)pyridine (L2), 2,6-di(5-tertbutylpyrazol-3-yl)pyridine (L3), 2-(5-tertbutylpyrazol- 3-yl)-6-(5-methylpyrazol-3-yl)pyridine (L4) and 2-(5- tertbutylpyrazol-3-yl)-6-(5-aminopyrazol-3-yl)pyridine (L5) are reported. Iron complex salts of the first four ligands were crystallographically characterised. The structures exhibit intermolecular hydrogen bonding between the cations and the anions and/or solvent, leading to a fluorite (flu) net, a 1D ladder structure, and a homochiral self-penetrating helical network related to the (10,3)-a (srs) topology. All the complexes are high-spin in the crystal, and bulk samples are also fully or predominantly high-spin at room temperature and below although two of the dried materials exhibit partial spin-state transitions on cooling. This journal is the Partner Organisations 2014.
Further studies on the biodegradation of ionic liquids
Ford, Leigh,Harjani, Jitendra R.,Atefi, Farzad,Garcia, M. Teresa,Singer, Robert D.,Scammells, Peter J.
, p. 1783 - 1789 (2010)
A range of ionic liquids (ILs) containing a pyridinium cation were synthesised and their biodegradability was evaluated using the CO2 headspace test (ISO 14593). ILs bearing a 1-(2-hydroxyethyl) side chain were prepared from either pyridine or nicotinic acid derivatives. These ILs showed high levels of biodegradation under aerobic conditions and can be classified as 'readily biodegradable'. In contrast, pyridinium ILs with methyl or ethyl ether side chains showed significantly lower levels of biodegradability in the same test. Biodegradation studies on a range of novel ILs with acetal and carbamate functionalities, as well as thiazolium-based salts, also showed low levels of mineralization.
The AAAA?DDDD hydrogen bond dimer. Synthesis of a soluble sulfurane as AAAA domain and generation of a DDDD counterpart
Taubitz, Joerg,Luening, Ulrich
, p. 1550 - 1555 (2009)
Sulfurane 5b with solubility enhancing substituents has been synthesized to be used as an AAAA recognition site in quadruple hydrogen bond heterodimers. A complementary DDDD partner [4b + H+] has been generated from a DDAD domain 4b by protonation. The association constant for the heterodimer complex formation has been determined by NMR titration in chloroform. CSIRO 2009.
Synthesis and nicotinic activity of epiboxidine: An isoxazole analogue of epibatidine
Badio, Barbara,Garraffo, H. Martin,Plummer, Carlton V.,Padgett, William L.,Daly, John W.
, p. 189 - 194 (1997)
Synthetic (±)-epiboxidine (exo-2-(3-methyl-5-isoxazolyl)-7-azabicyclo[2.2.1]heptane) is a methylisoxazole analog of the alkaloid epibatidine, itself a potent nicotinic receptor agonist with antinociceptive activity. Epiboxidine contains a methylisoxazolyl ring replacing the chloropyridinyl ring of epibatidine. Thus, it is also an analog of another nicotinic receptor agonist, ABT 418 ((S)-3-methyl-5-(1-methyl-2-pyrrolidinyl)isoxazole), in which the pyridinyl ring of nicotine has been replaced by the methylisoxazolyl ring. Epiboxidine was about 10-fold less potent than epibatidine and about 17-fold more potent than ABT 418 in inhibiting [3H]nicotine binding to α4β2 nicotinic receptors in rat cerebral cortical membranes. In cultured cells with functional ion flux assays, epiboxidine was nearly equipotent to epibatidine and 200-fold more potent than ABT 418 at α3β(4(5)) nicotinic receptors in PC12 cells. Epiboxidine was about 5-fold less potent than epibatidine and about 30-fold more potent than ABT 418 in TE671 cells with α1β1γδ nicotinic receptors. In a hot-plate antinociceptive assay with mice, epiboxidine was about 10-fold less potent than epibatidine. However, epiboxidine was also much less toxic than epibatidine in mice.
